Servoライブラリとattach

Generating precise pulses by hand is painful. The built-in Servo library does the timing for you, so you just say the angle you want. 😌

Bring the library into your sketch with an #include at the very top. That one line unlocks the Servo tools.

Next, create a Servo object. Think of it as your remote control: you give it a name, then send commands through it.

Tell the object which pin the signal wire uses with attach(). After this, that pin starts sending servo pulses.

Call attach() inside setup(), since you only need to bind the pin once when the board starts up.

The Servo library can drive almost any pin, but a PWM-capable pin like 9 or 10 is the safe, conventional choice on an Uno.

Command an angle using write(). Pass a number from 0 to 180 and the servo heads straight to that position.

Once attached, the object keeps holding the last angle you wrote. You only call write() again when you want it to move somewhere new.

If your servo undershoots or overshoots, attach() can take min and max pulse widths in microseconds to fine-tune its travel.

Call detach() to stop sending pulses and release the pin. Handy when you want the servo to go limp and save power.

Driving several servos? Create a separate Servo object for each one and attach them to different pins. They run independently.

Let's test how you connect a servo to a pin in code.

Include Servo.h, make an object, attach it to a pin in setup, then move it with write(). That's the whole setup pattern. 🔧